Fire pot for liquid-fuel burners



Feb. 14, 1928. 1,659,537

s. ANGROVE FIRE POT FOR LIQUID FUEL BURNERS Filed Aug. 25, 1926 A TTORNEYS.

Patented Feb. 14, 1928.;

UNITED` ls'rarlazs PATENT OFFICE.

SAMUEL ANGBOVE, 0F PROVIDENCE, RHODE ISLAND, ASSIGNOB, BY HEBNE ASSIGN- MENTS, TO BURNOYL HEATING CORPORATION, OF PROVIDENCE, RHODE ISLAND, A.

CORPORATION OF RHODE ISLAND.

FIRE POT FOR LIQUID-FUEL BURNEBS.

Appncaaon mea august 25, 1926. serxal no. iai-,37s.

This invention relates to an apparatus for burning liquid fuel such as hydrocarbon oil and has for its object to provide a firepot so constructed that the same will notbecome overheated and destroyed by the action of the lire therein.

A further object of the invention isto' scribed, and particularly pointed outin the appended claims.

In the accompanying drawings:

Figure l is a side elevation of the appa# ratus illustrating its relation to a furnace.

Figure 2 is a sectional side elevation of the combustion chamber. i Figure 3 is a plan view of the same. Figure 4 is a side elevation oi the lining for the combustion chamber.

Figure 5 is a sectional elevation of the same.

Figure 6 is a cross-sectional end view of the lining on line 6-'-6 of Figure 5.

Figure 7 is a sectional elevation of the plate .within therlining. the same being spaced from the bottom of the chamber. Y Figure 8 is a bottom view of the plate showing an. arrangement of projections thereon. `Figure 9 is a sectionalv elevation showin the lining and irepot in their operating relation.

Figure 10 is a sectional line 10,1O oi Figure 9. v

It is found inthe practical operation of liquid fuel burners of ythis character that `the iirepot often becomes so overheated that the casting is burned or destroyed and to prevent such undesirable effects, I have provideda fire pot or combustion chamber in which there is a lining spaced vvfrom the sides of this chamber having heat discharging ribs to permit circulation of air about the plan view taken on same to permit suiicient air cooling to the lining to prevent the chamber and lining from being overheated and destroyed; and the following is a detailed description of the present embodiment of this invention and showing one construction of mechanism by- `\there is a plate 30 provided `With an which these advantageous results may be accomplished.

With reference to the drawings, 10 designates the outer front wall of a furnace 1n which is positioned a firepot 1I of a liquid fuel burner having a motor'driven fan 12, air draft supply'conduit 13 and oil sup 1y chamber'14 discharging through a suita le' pipe 15 controlled by valve 16.

-This firepot consists of a combustion chamber 17 having a cylindrical protruding boss 18 to which the air draft conduit 15 is attached. This chamber is also-provided with a discharge opening 19 and a discharge pipe 20, the discharge plpe being obstructed by means of a projecting portion 21 raised from the bottom 22 of the chamber to prevent any sediment or yforeign matter from entering the discharge pipe to clog the same.

IVithin the combustion chamber or firepot there is a lining having side walls 23 provided with'vertcally disposed ribs 24 which are tapered slightly to be larger at their upper end adjacent the' flange- 25 than at their lower open end.'v The lining is substantially cylindrical in shape and rests upon the bottom wall 22 vof the combustion chamber with the flange spaced as at 26 from the top edge of the combustion chamber to permit circulation of air about the lining and discharge of` the heated air between the l' lining and the chamber.

An opening 27 is provided in the lining I y adjacent the air draft supply through which extendsthe oil discharge nozzle 28 which is made the Asubject of my copending patent application filed even date herewith.

In the bottom of the combustion chamber,

u wardly-extending ange 31 into which the oil from the nozzle Vmay drip to provide a ool of oil for initially startmgthe burner. his burner' is of such type that it opmittently on a -high llame when more heat is required, and needs only to be started by such method at the beginning of a season of use. The plate 30 is also provided with rolcrates on a low name continually and inter- 25 ceptible, the invention bein removable lining about its-eige walls andI a lining plate over its bottom oth of which are provided with projections which" are in .such shape as to stifen and strengthen the same and which also provide an increased surface for discharging heat into the air circulatin about the lining ofthe plate to revent t ese (parts from overheating and eing destroye It will be seen, moreover,

` that the arrangement of the partsl of the present burner 1s such than an air current is provided between the combustion chamber 17 and the lining 23 which is separate from v'and in addition to the air required for com- 1,5 bustion, thereby effectively cooling the lining Sojber, an inner lining `for said chamber spaced from the. side walls thereof, and projections on saidllning extending towafds said chamber for strengthening said lining pensing the heat thereof said ning and 8o chamber being constructed and arranged 'to ass a current of cooling air between them and dis-- prisin a casting of substantially the shape of sai chamber having an open bottom and spaced from the side walls of the chamber, pro'ections onsaid lining extending towards sai chamber, and a separate' plate within said casting having projections resting on the bottom of the chamber to space it t refrom tov complete the lining therefor and providing an air space between said chamer and lining, said lining and chamber being constructed and arranged to pass a current of cooling air between them in addition to the air used for combustion.

5. In an oil burner, a combustion chamber, an inner lining for said chamber comprising a wall of substantially the shape of said chamber spaced from the sidewalls thereof, and a separate plate spaced from the bottom of said chamber, said plate having an upwardly extending flange for retaining a predetermined quantity of oil therein for ignitionto initially start the burner.

6. A burner including a chamber having $0 an inlet for introducingiair, a lining supported' within the chamber and spaced therefrom, said lining having an aperture arranged to admit air from said inlet to support combustion, the lining and chamber being so arranged that the space between them connects with said inlet and with the atmosphere inde; pendently of the interior of the Ylining whereby a current of cooling air passes through said space in addition to and independently of the air used for combustion.

7. In an oil burner, a combustion chamber, an inner lining for said chamber spaced from 1n addition to the air used for combustionMthe side walls thereof, and pro]ections on 2. In an oil burner, a combustion chamber, an lnner lining for said chamber spaced o from the side walls thereof to form an air passage and radially projecting vertically disposed ribs of a ater cross-sectional area-at the top than the bottom carried by said lining for strengthening the same 45 and increasing the heat discharging surface A thereof.

Avn`lnL angoiglfbprner, a combustion chamber a lining of substantially the `shape of said chamber` rfestlngeor the-bott@ and l\j` 50 aced from the side walls thereof, and a extending outwardly ange on said linin d from the top edge of therefrom and space said chamber whereby the air may circulate `#about the lining and prevent it from being 65 destroyed.

.-In an oil burner, a combustion chamber, an-inner lining for said chamber com'- i sa-idnlinirggg'extgnding-tewardsaid chamber for strengthening said lining and dispensing the heatlthereof', and a flange on said lining extending outwardlylthgrefi'om and spaced from the top edge of saidhamber, whereby the air may circulate about the lining and 100 prevent it from being destroyed.

8. In an oil burner, a combustion eham-\5k ber, an inner lining for said chamber spac from the slde walls thereof, projections on said llmng extending toward said chamber \'fotrengthening said lining and dispensing 

